Added sample_date and fraction_recovered to all Norwegian oils. Fixed…

[knutfrode]

… 0.15 K/C issues. Changelogs and status updated. All oils do now validate without warnings or errors.

[knutfrode]

This is ready to merge

[ChrisBarker-NOAA]

This is an awful lot of digits -- probably a result of floating point calculations. It won't do any harm, so I"m going to merge, but it would be nice to clean up some day.

[knutfrode]

These extra decimals are added in the final step, when exporting an Adios oil object to file with o.to_file()
https://github.com/NOAA-ORR-ERD/adios_oil_database/blob/c3d87d7a9e70717211dfe1850d807586ef0cbdd2/adios_db/adios_db/models/oil/oil.py#L158
nlohmann/json#1109

I believe this can be solved by adding an "encoder" to json.dump:
https://stackoverflow.com/questions/1447287/format-floats-with-standard-json-module

[ChrisBarker-NOAA]

Thanks! -- there are issues with fraction_recovered -- if it's set to <1.0 (max_value=1.0), it can't be used as a GNOME OIl.

We'll try to track that down.

[knutfrode]

For all these oils, fraction_recovered should be 1

                "fraction_recovered": {
                    "unit": "fraction",
                    "max_value": 1.0,
                    "unit_type": "concentration"
                }

which means that they should work as Gnome oils?